The US topped the medal table as the women’s 4x100m medley relay team set a new world record on the final day of competition in Singapore

McIntosh blitzed the field in the 400 IM with a time of 4:25.78, the world record holder coming home more than seven seconds ahead of joint silver medallists Jenna Forrester of Australia and Japan's Mio Narita. China's 12-year-old prodigy Yu Zidi finished just off the podium again having also come fourth in the 200 IM and 200 butterfly.

American star Katie Ledecky won her seventh world title in the women’s 800-meter freestyle on Saturday, fending off the challenges of Canadian sensation Summer McIntosh and Australia’s Lani Pallister.